Air conditioning apparatus for



Nov. 1, 1949 E. s. DYBVlG 2,486,823

AIR CONDITIONING APPARATUS FOR MOUNTING IN WINDOWS Filed March 4, 1947 2 Sheets-Sheet 1 61 a 5 FIG. 2

Edwin S. D bv I19. INVENTOR.

BYMM+% Nov. Tl, 1949 s, DYBVIG 2,486,828

AIR CONDITIONING APPARATUS FOR MOUNTING IN WINDOWS Filed March 4, 1947 2 Sheets-Sheet 2 FIG..4

Patented Nov. 1, 1949 AIR CONDITIONING APPARATUS FOR MOUNTING m WINDOWS Edwin S. Dybvig, Dayton, Ohio, assignor to General Motors Corporation, Dayton, Ohio, a corporation of Delaware Application March 4, 1947, Serial No. 732,199

15 Claims. 1

This invention relates to refrigerating apparatus and more particularly to a refrigerating apparatus for use in conditioning air.

It is an object of this invention to provide an improved arrangement for controlling the introduction of fresh air and recirculated air into an air conditioning unit.

Another object of this invention is to simplify the arrangement for changing over from ventilation to exhaust.

More particularly it is an object of this invention to provide a window air conditioning unit in which movement of the unit relative to the window controls the flow of fresh air into the room to be conditioned and also controls the flow of room air into the outside atmosphere.

Still another object of this invention is to provide an improved arrangement for mounting a window air conditioning unit which facilitates removal of the unit for inspection and repair purposes.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.

In the drawings:

Figure 1 is an elevational view with parts broken away showing a preferred form of window air conditioning unit embodying my invention;

Figure 2 is a horizontal sectional view taken substantially on line 2-2 of Figure 1 showing the relationship of the unit to the window when the window is used for conditioning 100% recirculated air;

Figure 3 is a similar sectional view showing the arrangement of the unit relative to the window when outside air is introduced through the unit into the conditioned space;

Figure 4 is a similar sectional view showing the arrangement of the unit relative to the window when room air is exhausted through the unit into the outside atmosphere; and,

Figure 5 is a fragmentary sectional view taken substantially on line 5-5 of Figure 2.

Referring now to the drawings wherein I have shown a preferred arrangement, reference numeral l9 designates a cabinet which is adapted to be slidably mounted on a stationary support or mounting bracket I2 which is rigidly secured to the window sill H. The cabinet I is provided with side lugs l6 which engage within channels l8 (see Figure provided in the support l2. Suitable gaskets H are provided between the cabinet HI and the usual window blocking panels IS. The gaskets l'l, being carried by the window blocking panels l9, remain stationary during movement of the cabinet H]. Relative movement between the cabinet 10 and the stationary mounting bracket 12 is controlled by means of the hand crank 20 which operates the screw 22 which has its one end journalled in the front wall of the cabinet ID as shown at 24. The mounting bracket I2 is provided with a projecting lug 26 which is in the form of a screw follower whereby rotation of the screw 22 causes relative movement between the cabinet l0 and the stationary lug 26 and the bracket I2. The lug 26 is removably secured to the mounting bracket 12 by means of the cap screw 2'! for a purpose set forth hereiinafter.

As best shown in Figures 2 through 4, the cabinet I0 is divided into an evaporator compartment 30 and a motor-compressor-condenser compartment 32 by means of a vertical wall 34. The evaporator 36 is mounted in the compartment 36 adjacent to the air outlet opening 38 which is provided in the front wall of the cabinet It]. A U-shaped condenser 46 is arranged as shown in the rearwardly projecting portion of the cabinet I0. A conventional sealed motor-compressor unit 42 is mounted within the compartment 32 and serves to withdraw refrigerant vapor from the evaporator 36 via the suction line 44 and to discharge the compressed refrigerant into the condenser 4|] via the discharge line 46. The condensed refrigerant flows from the condenser to the evaporator 36 through the liquid line 48 in which there is mounted a conventional refrigerant flow control device 50 which may be either a thermostatic expansion valve, a fixed restrictor type of control or any other suitable flow control device. A fan motor 5| is provided for operating a pair of fans 52 and 54 which are arranged as shown.

The evaporator compartment fan 52 serves to pull in air through the side air inlets 56 and to discharge the air through the evaporator 36 and the air outlet 38. A baffie means 60 is provided for separating the incoming air from the outgoing air within the evaporator compartment 30. The condenser fan 54 pulls in air through the side air inlets 62 and discharges the air out through the rear outlets 64.

A condensate collecting pan Ill is provided for collecting condensation formed on the evaporator. The condensate thus collected flows through the drain pipe 12 into the pan 14 located directly beneath the condenser fan 54 whereby the tips of the fan blade 54 strike the water in the pan l4 so as to atomize the same in accordance with practice which is now well-known and needs no further description.

By virtue of the arrangement of the air inlet openings, it is obvious that movement of the cabinet Hl relative to the mounting bracket I2 may be used for controlling the sources of air entering the air inlets. Thus, with the cabinet placed as shown in Figure 2, room air only is introduced into the evaporator compartment and outside air only is introduced into the condenser compartment, but when the cabinet I is moved to the rear on the mounting bracket H! (see Figure 3) the air inlets 5B are positioned so as to cause outside air as well as room air to be introduced into the evaporator compartment 30. Likewise by moving the cabinet l0 forwardly relative to the mounting bracket l2 (see Figure 4) the air inlets 62 are shifted so as to cause room air to be exhausted through the cabinet by the condenser fan 54.

Another advantage of the mounting arrangement disclosed herein is that the main casing I0 and the parts carried thereby may be removed from the mounting bracket l2 for inspection and repair purposes with very little difliculty. Thus by removing the cap screw 21 so as to disconnect the follower 25 from the mounting bracket l2 it is possible to slide the casing l0 completely out of the window opening.

It will be noted that the front end of the casing III which projects into the room to be conditioned is rectangular in shape, whereas the rear portion of the casing I0 is curved as indicated. This curved arrangement makes it possible to provide a very long condenser which is built into the shape of a U. By virtue of this construction a large quantity of air may be circulated in thermal exchange with the condenser by means of an ordinary fan such as the fan 54.

In order to simplify this disclosure, the usual air filters and other immaterial details which form no part of this invention have been omitted. For purposes of illustration I have shown a conventional refrigerating system for use in cooling the air only, whereas it is within the province of my invention to reverse the cycle of refrigeration so as to provide for heating of the air when heating is required. The method of reversing the cycle may, for example, be that shown in Patent Numbers 2,344,706 and 2,343,514. It will also be noted that upon removal of the screw follower 26 from the support I! it is possible to remove the casing from the support I2 and turn the casing end for end on the support so as to place the condenser end in the room and the evaporator end outside.

While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, as may come within the scope of the claims which follow.

What is claimed is as follows:

1. An air conditioning unit comprising a casing adapted to be positioned in a window of a space to be conditioned, the front wall and at least a. portion of the sides, bottom and top of said casing extending into the space to be conditioned, a partition dividing said easing into two chambers, each of said chambers having side air inlet opening means and air outlet opening means, fan means for flowing air through each of said chambers, a refrigerant system including an evaporator in one of said chambers and a condenser in another of said chambers, and means for m'ovably supporting said casing for bodily movement substantially perpendicular to the plane-of the window into and out of the space to be conditioned, said air inlet opening means being so arranged that movement of said casing causes movement of at least a. portion of one of said air inlet openings to be moved from one side of said window to the other side of said window.

2. In an air conditioning unit of the type adapted to be positioned in an opening in a wall of a space to be conditioned; a casing; means adapted to support said casin within said wall opening; means for dividing said casing into a plurality of compartments; a refrigerant evaporator in one of said compartments; a refrigerant condenser in another of said compartments; a compressor; refrigerant flow means connecting said condenser, evaporator and compressor; refrigerant flow control means for controlling the flow of refrigerant to said evaporator; said cabinet having air inlet and outlet openings for each of said compartments; means for circulating air to be conditioned in through one of said evaporator compartment openings and out through another of said evaporator compartment openings; means for flowing condenser cooling air in through one of said condenser compartment openings and out through another of said condenser compartment openings; and means for slidably supporting said casing within said wall opening; at least one of said air inlet openings being arranged so as to move from a position adjacent said wall to a position straddling said wall upon sliding movement of said casing.

3. In an air conditioning unit comprising a casing adapted to be positioned in a window of a space to be conditioned with the front portion of the casing projecting into said space and the back portion projecting outside of said space, said front portion being rectangular in shape and said back portion being u-shaped in horizontal section, means for dividing said casing into a front evaporator compartment and a rear condenser compartment, a U-shaped condenser disposed within said condenser compartment, an evaporator disposed within said evaporator compartment, a compressor disposed in the space formed between the opposed sides of said U-shaped condenser, refrigerant flow means for connecting said evaporator, compressor, and condenser in series refrigerant flow relationship, each of said compartments having air inlet and air outlet openings, said condenser compartment having two air inlets adjacent the two legs for admitting air to the two legs of the condenser and an air outlet adjacent the middle of the condenser, fan means for flowing air to be conditioned through said evaporator compartment, and means for flowing condenser cooling air in through both air inlets and through both leg portions of said condenser and out through the middle portion of said condenser and said air outlet.

4. An air conditioning unit comprising a casing adapted to be positioned in a window opening of a wall which forms one wall of a space to be conditioned, means for slidably supporting said casing in said window with one portion of said casing projecting into the space to be conditioned and another portion projecting into the outside atmosphere, a pair of air inlet openings in one side of said casing, a partition means within said casing separating said casing into an evaporator compartment and a condenser compartment, one of said air inlet openings communicating with said evaporator compartment and one of said air inlet openings communicating with said condenser compartment, an evaporator in said evaporator compartment, a condenser in said condenser compartment, a compressor in said condenser compartment, refrigerant flow means connecting said evaporator, compressor, and condenser, said air inlet openings being so arranged that upon sliding movement of said casing at least one of said openings may be moved from a position at one side of said wall to a position so as to have one portion thereof communicating with the outside atmosphere and another portion communicating with the air in the space to be conditioned.

5. An air conditioning unit comprising a casing adapted to be positioned in a window opening of a wall which constitutes one wall of a room to be conditioned, means adapted for slidably supporting said casing in said window opening with one portion of the casing projecting into the room to be conditioned and another portion projecting into the outside atmosphere, partition means within said casing separating said casing into an evaporator compartment and a condenser compartment, evaporator compartment air inlet and outlet openings in said casing, an evaporator in said evaporator compartment, a condenser in said condenser compartment, a compressor, means for connecting said evaporator, compressor, and condenser in a closed refrigerant circuit, said evaporator air inlet opening being so arranged that upon sliding movement of said casin it may be moved from a position in which it communicates solely with the air in the room to be conditioned to a position in which it communicates with air on both sides of said wall whereby both room air and outside air may be introduced into said evaporator compartment through said inlet opening, means including a blower for directing condenser cooling air in thermal exchange with said condenser, and blower'means for circulating air in through said evaporator compartment air inlet opening, into thermal exchange with said evaporator and out into the space to be conditioned.

6. An air conditioning unit comprising a casing adapted to be positioned in a window opening of a wall which constitutes one wall of a room to be conditioned, means adapted for slidably supporting said casing in said window opening with one portion of said casing projecting into the room to be conditioned and another portion projecting into the outside atmosphere, air conditioning means within said casing, said casing having an air inlet opening and an air outlet opening, means for flowing air to be conditioned in through said inlet opening and out through said outlet opening, said inlet opening being positioned in a side of said casing which projects through said window opening at a point whereby movement of said casing relative to said room wall varies the amount of said inlet opening exposed to the air in the room to be conditioned.

'7. In an air conditioning unit, a casing, air conditioning apparatus within said casing including an evaporator and a condenser, means for separating said casing into an evaporator compartment in which said evaporator is located and a condenser compartment in which said condenser is located, an air inlet opening for said condenser compartment in one wall of said casing, an air inlet opening for said evaporator compartment in said one wall, a vane extending outwardly from said casing intersecting said wall and adapted to separate two sources of air, and means for slidably supporting said cabinet relative to said vane whereby movement of said cabinet relative to said vane causes said inlet openings to be moved from one side of said vane to the other side of said vane.

8. An air conditioning unit comprising a casing adapted to be positioned in a window opening of a wall which constitutes one wall of a room to be conditioned, means adapted for slidably supporting said casing in said window opening with one portion of said casing projecting into the room to be conditioned and another portion projecting into the outside atmosphere, air conditioning means within said casing, said casing having an air inlet opening in one side thereof, means including a fan for directing a stream of air in through said inlet opening and out of said easing into the outside atmosphere, said inlet opening being positioned in a side wall of said casing which is adapted to project through the window opening at a point whereby sliding movement of said casing relative to said supporting means is adapted to vary the amount of said inlet opening exposed to the air in said room.

9. An air conditioning unit comprising a casing adapted to be positioned in a window opening of a wall which constitutes one wall of a room to be conditioned, means adapted for slidably supporting said casing in said window opening with one portion of said casing projecting into the room to be conditioned and another portion projecting into the outside atmosphere, air conditioning means within said casing, said casing having an air inlet opening in one side thereof, means including a fan for directing a stream of air in through said inlet opening and out of said casing into the outside atmosphere, said inlet openin being positioned in a side Wall of said casing which is adapted to project through the window opening at a point whereby sliding movement of said casing relative to said supporting means is adapted to vary the amount of said inlet opening exposed to the air in said room, said casing having a second air inlet opening adjacent said firstnamed air inlet opening, and means including a fan for directing a second stream of air in through said second air inlet opening and for discharging said air into said room.

10. An air conditioning unit comprising a casing adapted to be positioned in a window opening of a wall which constitutes one wall of a room to be conditioned, means adapted for slidably supporting said casing in said window opening with one portion of said casing projecting into the room to be conditioned and another portion projecting into the outside atmosphere, air conditioning means within said casing, said casing having an air inlet opening in one side thereof, means including a fan for directing a stream of air in through said inlet opening and out of said casing into the outside atmosphere, said inlet opening being positioned in a side wall of said casing which is adapted to project through the window opening at a point whereby sliding movement of said casing relative to said sup-porting means is adapted to vary the amount of said inlet opening exposed to the air in said room, said casing having a second air inlet opening adjacent said first-named air inlet opening, and means including a fan for directing a second stream of air in through said second air inlet opening and for discharging said air into said room, said air conditioning means comprising a heat dissipating portion arranged in thermal exchange relationship with said first-namedstream of air and a heat absorbing portion arranged in assassin thermal exchange relationship with said secondnamed stream of air.

11. An air conditioning unit comprising a casing adapted to be positioned in a window opening of a wall which constitutes one wall of a room to be conditioned, means adapted for slidably supporting said casing in said window opening with one portion of said casing projecting into the room to be conditioned and another portion promeans is adapted to vary the amount of said inlet h opening exposed to the air in said room, and means including a hand crank for adjustably moving said casing relative to said supporting means.

12. An air conditioning unit comprising 9. casing adapted to be positioned in a window opening of a wall which constitutes one wall of a room to be conditioned, means adapted for slidably sup porting said casing in said window opening with one portion of said casing projecting into the room to be conditioned and another portion projecting into the outside atmosphere, air conditioning means within said casing, said casing having an air inlet opening in one side thereof, means including a fan for directing a stream of air in through said inlet opening and out of said casing into the outside atmosphere, said inlet opening being positioned in a side wall of said casing which is adapted to project through the window opening at a point whereby sliding movement of said casing relative to said supporting means is adapted to vary the amount of said inlet opening exposed to the air in said room, said casing having a second air inlet opening .adjacent said firstnamed air inlet opening, and means including a fan for directing a second stream of air in through said second air inlet opening and for discharging said air into said room, said air conditioning means comprising a heat dissipating portion arranged in thermal exchange relationship with said first-named stream of air and a heat absorbing portion arranged in thermal exchange relationship with said second-named stream of air, and means including a hand crank for adjustably moving said casing relative to said supporting means.

13. An air conditioning unit comprising a casing adapted to be positioned in a window opening of a wall which constitutes one wall of a room to be conditioned, means adapted for slidably supporting said casing in said window opening with one portion of said casing projecting into the room to be conditioned and another portion projecting into the outside atmosphere, air conditioning means within said casing, said casing having an air inlet opening in one 'side thereof, means including a fan for directing a stream of air in through said inlet opening and out of said casing into the outside atmosphere, said inlet opening being positioned in a side wall of said casing which is adapted to project through the window opening at a point whereby sliding movement of said casing relative to said supporting means is adapted to vary the amount of said inlet opening exposed to the air in said room, said casing having a second air inlet opening adjacent said first-named air inlet opening, and means including a fan for directing a second stream of air in through said second air inlet opening and for discharging said air into said room, said air conditioning means comprising a heat dissipating portion arranged in thermal exchange relationship with said' first-named stream of air and a heat absorbing portion arranged in thermal exchange relationship with said second-named stream of air, and means including a hand crank for adjustably moving said casing relative to said supporting means, said last-named means including means for limiting movement of said casing relative said supporting means.

14. In an air conditioning unit comprising a casing adapted to be positioned in a window of a space to be conditioned with one portion of the casing projecting into said space and another portion of the casing projecting outside said space, the periphery of one of said portions being U-shaped in horizontal ing unit within said casing including a U-shaped heat transfer unit located in the portion having the U-shaped periphery and extending adjacent to and substantially parallel to the U-shaped periphery thereof, said U-shaped periphery having openings adjacent the U-shaped heat transfer unit to permit air circulation therethrough.

15. In an air conditioning unit comprising a casing adapted to be positioned in a window of a space to be conditioned with one portion of the casing projecting into said space and another portion of the casing projecting outside said space, the periphery of one of said portions being U-shaped in horizontal section, a refrigerating unit within said casing including a U-shaped heat transfer unit located in the portion having the U-shaped periphery and extending adjacent to and substantially parallel to the U-shaped periphery thereof, said U-shaped periphery having openings adjacent the U-shaped heat transfer unit to permit air circulation therethrough, means for dividing the U-shaped portion of the casing into two compartments including a dividing wall terminating at its opposite ends adjacent intermediate points upon the opposite sides of said U-shaped heat transfer unit, and means for moving air from one side of said wall to the other side thereof to move air in two passes through all portions of the heat transfer unit.

EDWIN S. DYBVIG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS section, a refrigeratv 

